Tolerance Allocation With Simulation-Based Digital Twin for CFRP-Metal Countersunk Bolt Joint

Abstract

Deviations in the countersunk hole’s angle and depth affect the strength of the bolted composites under tensile loading. Tolerance of the countersunk hole’s angle and depth could be allocated by the Digital Twin of the bolted CFRP-Metal bolt joint. The paper presents a simulation-based Digital Twin for tolerance allocation of CFRP-Metal countersunk bolt joint, mainly considering the strength of the single bolt countersunk joint. Using the design-of-experiment method, nine numerical models with different hole’s angle and depth are constructed to simulate the countersunk holes with different deviations. Simulation results are input into the Digital Twin of the CFRP-Metal countersunk bolt joint. Analysis of variation (ANOVA) method is employed to deeply investigate the interaction between the angle deviation and the depth deviation under tensile loading. Tolerance of the countersunk hole is allocated based on the proposed Digital Twin involving simulation information. The depth should be more strictly controlled than the angle during the course of countersinking. The reported work enhances the understanding of the tolerance allocation for the bolted joint of the composites, and of the simulation-based Digital Twin for CFRP-Metal countersunk bolt joint.

Towards a Family of Digital Model/Shadow/Twin Workflows and Architectures

“…It is used to design all the required parts and already analyze it to ensure correct functionality. This is also called Variation Analysis (Wang et al, 2018) or Virtual Prototyping (Poppe et al, 2019). Design-Space Exploration allows engineers to explore any number of variations to check their accuracy w.r.t.…”

Effects of countersunk hole’s geometrical deviation on the strength of bolted carbon fiber–reinforced plastic/polymer metal joints under tensile loading

“…Numerical results of the bearing type joints with two, three, and four rows of bolted connections were reported. Wang et al 25 studied the tolerance optimization method for the countersunk hole using the Digital Twin of the bolted joint.…”